1978925810 has 32 divisors (see below), whose sum is σ = 3753216000. Its totient is φ = 749174400.

The previous prime is 1978925807. The next prime is 1978925821. The reversal of 1978925810 is 185298791.

It is a super-2 number, since 2×1978925810² = 7832294722968312200, which contains 22 as substring.

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, 214166 + ... + 223214.

It is an arithmetic number, because the mean of its divisors is an integer number (117288000).

Almost surely, 2^1978925810 is an apocalyptic number.

1978925810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1978925810 is a deficient number, since it is larger than the sum of its proper divisors (1774290190).

1978925810 is a wasteful number, since it uses less digits than its factorization.

1978925810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226.

The product of its (nonzero) digits is 362880, while the sum is 50.

The square root of 1978925810 is about 44485.1189725283. The cubic root of 1978925810 is about 1255.4801123849.

The spelling of 1978925810 in words is "one billion, nine hundred seventy-eight million, nine hundred twenty-five thousand, eight hundred ten".