157175640 has 160 divisors (see below), whose sum is σ = 533610000. Its totient is φ = 41492736.

The previous prime is 157175639. The next prime is 157175671. The reversal of 157175640 is 46571751.

Added to its reverse (46571751) it gives a triangular number (203747391 = T₂₀₁₈₆).

157175640 is a `hidden beast` number, since 1 + 5 + 7 + 1 + 7 + 5 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 157175595 and 157175604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 450186 + ... + 450534.

Almost surely, 2^157175640 is an apocalyptic number.

157175640 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 157175640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266805000).

157175640 is an abundant number, since it is smaller than the sum of its proper divisors (376434360).

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

157175640 is a wasteful number, since it uses less digits than its factorization.

157175640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 157175640 is about 12536.9709260252. The cubic root of 157175640 is about 539.6701689512.

Adding to 157175640 its reverse (46571751), we get a triangular number (203747391 = T₂₀₁₈₆).

The spelling of 157175640 in words is "one hundred fifty-seven million, one hundred seventy-five thousand, six hundred forty".