621161240 has 48 divisors (see below), whose sum is σ = 1625799600. Its totient is φ = 212968896.

The previous prime is 621161227. The next prime is 621161251. The reversal of 621161240 is 42161126.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 156500 + ... + 160419.

It is an arithmetic number, because the mean of its divisors is an integer number (33870825).

Almost surely, 2^621161240 is an apocalyptic number.

It is an amenable number.

621161240 is an abundant number, since it is smaller than the sum of its proper divisors (1004638360).

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

621161240 is a wasteful number, since it uses less digits than its factorization.

621161240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316944 (or 316933 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 621161240 is about 24923.1065479406. The cubic root of 621161240 is about 853.2339273582.

The spelling of 621161240 in words is "six hundred twenty-one million, one hundred sixty-one thousand, two hundred forty".