156769940 has 48 divisors (see below), whose sum is σ = 344509200. Its totient is φ = 59845632.

The previous prime is 156769933. The next prime is 156769961. The reversal of 156769940 is 49967651.

It can be written as a sum of positive squares in 8 ways, for example, as 169744 + 156600196 = 412^2 + 12514^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50102 + ... + 53138.

It is an arithmetic number, because the mean of its divisors is an integer number (7177275).

Almost surely, 2^156769940 is an apocalyptic number.

156769940 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 156769940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172254600).

156769940 is an abundant number, since it is smaller than the sum of its proper divisors (187739260).

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

156769940 is a wasteful number, since it uses less digits than its factorization.

156769940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164 (or 3162 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 156769940 is about 12520.7803271202. The cubic root of 156769940 is about 539.2054386726.

The spelling of 156769940 in words is "one hundred fifty-six million, seven hundred sixty-nine thousand, nine hundred forty".