145379988 has 96 divisors (see below), whose sum is σ = 429851520. Its totient is φ = 42094080.

The previous prime is 145379957. The next prime is 145379989. The reversal of 145379988 is 889973541.

145379988 is a `hidden beast` number, since 14 + 537 + 9 + 98 + 8 = 666.

It is a super-2 number, since 2×145379988² = 42270681821760288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145379989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20823 + ... + 26913.

It is an arithmetic number, because the mean of its divisors is an integer number (4477620).

Almost surely, 2^145379988 is an apocalyptic number.

145379988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145379988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214925760).

145379988 is an abundant number, since it is smaller than the sum of its proper divisors (284471532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145379988 is a wasteful number, since it uses less digits than its factorization.

145379988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6134 (or 6126 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 145379988 is about 12057.3623981367. The cubic root of 145379988 is about 525.8173065696.

The spelling of 145379988 in words is "one hundred forty-five million, three hundred seventy-nine thousand, nine hundred eighty-eight".