126978810 has 32 divisors (see below), whose sum is σ = 348285312. Its totient is φ = 29023680.

The previous prime is 126978809. The next prime is 126978827. The reversal of 126978810 is 18879621.

It is a super-2 number, since 2×126978810² = 32247236378032200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 302121 + ... + 302540.

It is an arithmetic number, because the mean of its divisors is an integer number (10883916).

Almost surely, 2^126978810 is an apocalyptic number.

126978810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126978810 is an abundant number, since it is smaller than the sum of its proper divisors (221306502).

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

126978810 is a wasteful number, since it uses less digits than its factorization.

126978810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604678.

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 126978810 is about 11268.4874761434. The cubic root of 126978810 is about 502.6246120500.

The spelling of 126978810 in words is "one hundred twenty-six million, nine hundred seventy-eight thousand, eight hundred ten".