1976620845 has 16 divisors (see below), whose sum is σ = 3248069760. Its totient is φ = 1025705664.

The previous prime is 1976620837. The next prime is 1976620871. The reversal of 1976620845 is 5480266791.

It is not a de Polignac number, because 1976620845 - 2³ = 1976620837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1976620794 and 1976620803.

It is a congruent number.

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, 1780185 + ... + 1781294.

It is an arithmetic number, because the mean of its divisors is an integer number (203004360).

Almost surely, 2^1976620845 is an apocalyptic number.

1976620845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1976620845 is a deficient number, since it is larger than the sum of its proper divisors (1271448915).

1976620845 is a wasteful number, since it uses less digits than its factorization.

1976620845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561524.

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 1976620845 is about 44459.2042776296. The cubic root of 1976620845 is about 1254.9924804976.

The spelling of 1976620845 in words is "one billion, nine hundred seventy-six million, six hundred twenty thousand, eight hundred forty-five".