145287870 has 128 divisors (see below), whose sum is σ = 451906560. Its totient is φ = 29030400.

The previous prime is 145287853. The next prime is 145287871. The reversal of 145287870 is 78782541.

It is a super-2 number, since 2×145287870² = 42217130338273800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145287871) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50470 + ... + 53270.

It is an arithmetic number, because the mean of its divisors is an integer number (3530520).

Almost surely, 2^145287870 is an apocalyptic number.

145287870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 145287870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225953280).

145287870 is an abundant number, since it is smaller than the sum of its proper divisors (306618690).

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

145287870 is a wasteful number, since it uses less digits than its factorization.

145287870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2850.

The product of its (nonzero) digits is 125440, while the sum is 42.

The square root of 145287870 is about 12053.5418031382. The cubic root of 145287870 is about 525.7062241723.

The spelling of 145287870 in words is "one hundred forty-five million, two hundred eighty-seven thousand, eight hundred seventy".