1214746978 has 16 divisors (see below), whose sum is σ = 1912740480. Its totient is φ = 577483456.

The previous prime is 1214746957. The next prime is 1214746979. The reversal of 1214746978 is 8796474121.

It is a super-2 number, since 2×1214746978² = 2951220441120264968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1214746979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71383 + ... + 86746.

It is an arithmetic number, because the mean of its divisors is an integer number (119546280).

Almost surely, 2^1214746978 is an apocalyptic number.

1214746978 is a deficient number, since it is larger than the sum of its proper divisors (697993502).

1214746978 is a wasteful number, since it uses less digits than its factorization.

1214746978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158321.

The product of its digits is 677376, while the sum is 49.

The square root of 1214746978 is about 34853.2204824748. The cubic root of 1214746978 is about 1066.9939144139.

The spelling of 1214746978 in words is "one billion, two hundred fourteen million, seven hundred forty-six thousand, nine hundred seventy-eight".