154992640 has 136 divisors (see below), whose sum is σ = 415232928. Its totient is φ = 55050240.

The previous prime is 154992637. The next prime is 154992679. The reversal of 154992640 is 46299451.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 154992593 and 154992602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3604459 + ... + 3604501.

Almost surely, 2^154992640 is an apocalyptic number.

154992640 is a gapful number since it is divisible by the number (10) 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 154992640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207616464).

154992640 is an abundant number, since it is smaller than the sum of its proper divisors (260240288).

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

154992640 is an frugal number, since it uses more digits than its factorization.

154992640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 154992640 is about 12449.6040097667. The cubic root of 154992640 is about 537.1600330794.

The spelling of 154992640 in words is "one hundred fifty-four million, nine hundred ninety-two thousand, six hundred forty".