154997864 has 32 divisors (see below), whose sum is σ = 338411520. Its totient is φ = 65173056.

The previous prime is 154997863. The next prime is 154997873. The reversal of 154997864 is 468799451.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is not an unprimeable number, because it can be changed into a prime (154997863) 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, 23144 + ... + 29079.

It is an arithmetic number, because the mean of its divisors is an integer number (10575360).

Almost surely, 2^154997864 is an apocalyptic number.

154997864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

154997864 is an abundant number, since it is smaller than the sum of its proper divisors (183413656).

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

154997864 is a wasteful number, since it uses less digits than its factorization.

154997864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52289 (or 52285 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 53.

The square root of 154997864 is about 12449.8138138689. The cubic root of 154997864 is about 537.1660679735.

The spelling of 154997864 in words is "one hundred fifty-four million, nine hundred ninety-seven thousand, eight hundred sixty-four".