620915730 has 32 divisors (see below), whose sum is σ = 1491868800. Its totient is φ = 165391872.

The previous prime is 620915719. The next prime is 620915761. The reversal of 620915730 is 37519026.

It is a super-2 number, since 2×620915730² = 771072687522865800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 620915691 and 620915700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16731 + ... + 39009.

It is an arithmetic number, because the mean of its divisors is an integer number (46620900).

Almost surely, 2^620915730 is an apocalyptic number.

620915730 is an abundant number, since it is smaller than the sum of its proper divisors (870953070).

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

620915730 is a wasteful number, since it uses less digits than its factorization.

620915730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23218.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 620915730 is about 24918.1807120825. The cubic root of 620915730 is about 853.1215007974.

The spelling of 620915730 in words is "six hundred twenty million, nine hundred fifteen thousand, seven hundred thirty".