12978190 has 16 divisors (see below), whose sum is σ = 23451840. Its totient is φ = 5171040.

The previous prime is 12978169. The next prime is 12978211. The reversal of 12978190 is 9187921.

It is an interprime number because it is at equal distance from previous prime (12978169) and next prime (12978211).

It is a super-2 number, since 2×12978190² = 336866831352200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316 + ... + 5104.

It is an arithmetic number, because the mean of its divisors is an integer number (1465740).

Almost surely, 2^12978190 is an apocalyptic number.

12978190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12978190 is a deficient number, since it is larger than the sum of its proper divisors (10473650).

12978190 is a wasteful number, since it uses less digits than its factorization.

12978190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5067.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 12978190 is about 3602.5255030326. The cubic root of 12978190 is about 235.0019012974.

The spelling of 12978190 in words is "twelve million, nine hundred seventy-eight thousand, one hundred ninety".