620687708 has 6 divisors (see below), whose sum is σ = 1086203496. Its totient is φ = 310343852.

The previous prime is 620687707. The next prime is 620687713. The reversal of 620687708 is 807786026.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620687701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77585960 + ... + 77585967.

It is an arithmetic number, because the mean of its divisors is an integer number (181033916).

Almost surely, 2^620687708 is an apocalyptic number.

It is an amenable number.

620687708 is a deficient number, since it is larger than the sum of its proper divisors (465515788).

620687708 is a wasteful number, since it uses less digits than its factorization.

620687708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155171931 (or 155171929 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 620687708 is about 24913.6048776567. The cubic root of 620687708 is about 853.0170559809.

The spelling of 620687708 in words is "six hundred twenty million, six hundred eighty-seven thousand, seven hundred eight".