145187400 has 48 divisors (see below), whose sum is σ = 450082800. Its totient is φ = 38716480.

The previous prime is 145187387. The next prime is 145187407. The reversal of 145187400 is 4781541.

It is a super-2 number, since 2×145187400² = 42158762237520000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (145187407) 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 11 ways as a sum of consecutive naturals, for example, 120390 + ... + 121589.

It is an arithmetic number, because the mean of its divisors is an integer number (9376725).

Almost surely, 2^145187400 is an apocalyptic number.

145187400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145187400 is an abundant number, since it is smaller than the sum of its proper divisors (304895400).

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

145187400 is a wasteful number, since it uses less digits than its factorization.

145187400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241998 (or 241989 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 145187400 is about 12049.3734276932. The cubic root of 145187400 is about 525.5850167975.

The spelling of 145187400 in words is "one hundred forty-five million, one hundred eighty-seven thousand, four hundred".