620428990970902 has 32 divisors (see below), whose sum is σ = 984418098066432. Its totient is φ = 292659473139264.

The previous prime is 620428990970809. The next prime is 620428990970903. The reversal of 620428990970902 is 209079099824026.

It is a super-2 number, since 2×620428990970902² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620428990970903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392658333 + ... + 394235239.

It is an arithmetic number, because the mean of its divisors is an integer number (30763065564576).

Almost surely, 2^{620428990970902} is an apocalyptic number.

620428990970902 is a deficient number, since it is larger than the sum of its proper divisors (363989107095530).

620428990970902 is a wasteful number, since it uses less digits than its factorization.

620428990970902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694172.

The product of its (nonzero) digits is 70543872, while the sum is 67.

The spelling of 620428990970902 in words is "six hundred twenty trillion, four hundred twenty-eight billion, nine hundred ninety million, nine hundred seventy thousand, nine hundred two".