620687970 has 48 divisors (see below), whose sum is σ = 1844331840. Its totient is φ = 141871392.

The previous prime is 620687941. The next prime is 620688023. The reversal of 620687970 is 79786026.

It is a happy number.

It is a super-2 number, since 2×620687970² = 770507112205441800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 491980 + ... + 493239.

It is an arithmetic number, because the mean of its divisors is an integer number (38423580).

Almost surely, 2^620687970 is an apocalyptic number.

620687970 is an abundant number, since it is smaller than the sum of its proper divisors (1223643870).

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

620687970 is a wasteful number, since it uses less digits than its factorization.

620687970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985239 (or 985236 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 620687970 is about 24913.6101358274. The cubic root of 620687970 is about 853.0171760039.

The spelling of 620687970 in words is "six hundred twenty million, six hundred eighty-seven thousand, nine hundred seventy".