52207740 has 240 divisors, whose sum is σ = 183846432. Its totient is φ = 12317184.

The previous prime is 52207733. The next prime is 52207781. The reversal of 52207740 is 4770225.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 779187 + ... + 779253.

Almost surely, 2^52207740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52207740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91923216).

52207740 is an abundant number, since it is smaller than the sum of its proper divisors (131638692).

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

52207740 is a wasteful number, since it uses less digits than its factorization.

52207740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 52207740 is about 7225.4923707662. The cubic root of 52207740 is about 373.7475013162.

Adding to 52207740 its reverse (4770225), we get a palindrome (56977965).

The spelling of 52207740 in words is "fifty-two million, two hundred seven thousand, seven hundred forty".