145387904 has 64 divisors (see below), whose sum is σ = 305694000. Its totient is φ = 68769792.

The previous prime is 145387901. The next prime is 145387919. The reversal of 145387904 is 409783541.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×145387904² = 42275285259026432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145387901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196367 + ... + 197105.

Almost surely, 2^145387904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145387904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152847000).

145387904 is an abundant number, since it is smaller than the sum of its proper divisors (160306096).

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

145387904 is an equidigital number, since it uses as much as digits as its factorization.

145387904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 145387904 is about 12057.6906578333. The cubic root of 145387904 is about 525.8268500524.

The spelling of 145387904 in words is "one hundred forty-five million, three hundred eighty-seven thousand, nine hundred four".