52157790 has 128 divisors (see below), whose sum is σ = 149713920. Its totient is φ = 12887424.

The previous prime is 52157789. The next prime is 52157797. The reversal of 52157790 is 9775125.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52157797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 229657 + ... + 229883.

It is an arithmetic number, because the mean of its divisors is an integer number (1169640).

Almost surely, 2^52157790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52157790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74856960).

52157790 is an abundant number, since it is smaller than the sum of its proper divisors (97556130).

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

52157790 is a wasteful number, since it uses less digits than its factorization.

52157790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 52157790 is about 7222.0350317622. The cubic root of 52157790 is about 373.6282683912.

It can be divided in two parts, 521 and 57790, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 52157790 in words is "fifty-two million, one hundred fifty-seven thousand, seven hundred ninety".