620407628 has 12 divisors (see below), whose sum is σ = 1088674272. Its totient is φ = 309357840.

The previous prime is 620407621. The next prime is 620407633. The reversal of 620407628 is 826704026.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (620407621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209843 + ... + 212778.

It is an arithmetic number, because the mean of its divisors is an integer number (90722856).

Almost surely, 2^620407628 is an apocalyptic number.

It is an amenable number.

620407628 is a deficient number, since it is larger than the sum of its proper divisors (468266644).

620407628 is a wasteful number, since it uses less digits than its factorization.

620407628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422992 (or 422990 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 620407628 is about 24907.9832182375. The cubic root of 620407628 is about 852.8887311358. Note that the first 3 decimals are identical.

The spelling of 620407628 in words is "six hundred twenty million, four hundred seven thousand, six hundred twenty-eight".