52440690 has 32 divisors (see below), whose sum is σ = 131331456. Its totient is φ = 13376000.

The previous prime is 52440683. The next prime is 52440697. The reversal of 52440690 is 9604425.

It is an interprime number because it is at equal distance from previous prime (52440683) and next prime (52440697).

It is a super-2 number, since 2×52440690² = 5500051935352200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (52440697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37311 + ... + 38690.

It is an arithmetic number, because the mean of its divisors is an integer number (4104108).

Almost surely, 2^52440690 is an apocalyptic number.

52440690 is an abundant number, since it is smaller than the sum of its proper divisors (78890766).

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

52440690 is a wasteful number, since it uses less digits than its factorization.

52440690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76034.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 52440690 is about 7241.5944376912. The cubic root of 52440690 is about 374.3025614605.

It can be divided in two parts, 524 and 40690, that added together give a palindrome (41214).

The spelling of 52440690 in words is "fifty-two million, four hundred forty thousand, six hundred ninety".