620954978 has 16 divisors (see below), whose sum is σ = 1072155840. Its totient is φ = 264208176.

The previous prime is 620954977. The next prime is 620954981. The reversal of 620954978 is 879459026.

It is a happy number.

It is a super-3 number, since 3×620954978³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (620954977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157601 + ... + 161492.

It is an arithmetic number, because the mean of its divisors is an integer number (67009740).

Almost surely, 2^620954978 is an apocalyptic number.

620954978 is a deficient number, since it is larger than the sum of its proper divisors (451200862).

620954978 is a wasteful number, since it uses less digits than its factorization.

620954978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319241.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 620954978 is about 24918.9682370679. The cubic root of 620954978 is about 853.1394756506.

The spelling of 620954978 in words is "six hundred twenty million, nine hundred fifty-four thousand, nine hundred seventy-eight".