402140620 has 24 divisors (see below), whose sum is σ = 965137824. Its totient is φ = 137876736.

The previous prime is 402140611. The next prime is 402140639. The reversal of 402140620 is 26041204.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1436077 + ... + 1436356.

It is an arithmetic number, because the mean of its divisors is an integer number (40214076).

Almost surely, 2^402140620 is an apocalyptic number.

It is an amenable number.

402140620 is an abundant number, since it is smaller than the sum of its proper divisors (562997204).

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

402140620 is a wasteful number, since it uses less digits than its factorization.

402140620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872449 (or 2872447 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 402140620 is about 20053.4440932225. Note that the first 3 decimals coincide. The cubic root of 402140620 is about 738.1183139851.

Adding to 402140620 its reverse (26041204), we get a palindrome (428181824).

The spelling of 402140620 in words is "four hundred two million, one hundred forty thousand, six hundred twenty".