156693040 has 80 divisors (see below), whose sum is σ = 422169408. Its totient is φ = 52973568.

The previous prime is 156693037. The next prime is 156693049. The reversal of 156693040 is 40396651.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 156692987 and 156693005.

It is not an unprimeable number, because it can be changed into a prime (156693049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38964 + ... + 42796.

Almost surely, 2^156693040 is an apocalyptic number.

156693040 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 156693040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211084704).

156693040 is an abundant number, since it is smaller than the sum of its proper divisors (265476368).

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

156693040 is a wasteful number, since it uses less digits than its factorization.

156693040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926 (or 3920 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 156693040 is about 12517.7090555740. The cubic root of 156693040 is about 539.1172591828.

The spelling of 156693040 in words is "one hundred fifty-six million, six hundred ninety-three thousand, forty".