620978726 has 8 divisors (see below), whose sum is σ = 931604664. Its totient is φ = 310443840.

The previous prime is 620978689. The next prime is 620978741. The reversal of 620978726 is 627879026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×620978726² = 771229156289166152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1880 + ... + 35291.

It is an arithmetic number, because the mean of its divisors is an integer number (116450583).

Almost surely, 2^620978726 is an apocalyptic number.

620978726 is a deficient number, since it is larger than the sum of its proper divisors (310625938).

620978726 is a wasteful number, since it uses less digits than its factorization.

620978726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45526.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 620978726 is about 24919.4447369920. Note that the first 3 decimals coincide. The cubic root of 620978726 is about 853.1503514246.

The spelling of 620978726 in words is "six hundred twenty million, nine hundred seventy-eight thousand, seven hundred twenty-six".