52420040 has 32 divisors (see below), whose sum is σ = 120458880. Its totient is φ = 20521152.

The previous prime is 52420037. The next prime is 52420051. The reversal of 52420040 is 4002425.

52420040 = 1033² + 1034² + ... + 1079².

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12062 + ... + 15821.

It is an arithmetic number, because the mean of its divisors is an integer number (3764340).

Almost surely, 2^52420040 is an apocalyptic number.

It is an amenable number.

52420040 is an abundant number, since it is smaller than the sum of its proper divisors (68038840).

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

52420040 is a wasteful number, since it uses less digits than its factorization.

52420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27941 (or 27937 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 52420040 is about 7240.1685063264. The cubic root of 52420040 is about 374.2534242819.

Adding to 52420040 its reverse (4002425), we get a palindrome (56422465).

The spelling of 52420040 in words is "fifty-two million, four hundred twenty thousand, forty".