126932778 has 64 divisors (see below), whose sum is σ = 341349120. Its totient is φ = 34131456.

The previous prime is 126932753. The next prime is 126932803. The reversal of 126932778 is 877239621.

It is an interprime number because it is at equal distance from previous prime (126932753) and next prime (126932803).

It is a super-2 number, since 2×126932778² = 32223860261594568, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3451 + ... + 16302.

It is an arithmetic number, because the mean of its divisors is an integer number (5333580).

Almost surely, 2^126932778 is an apocalyptic number.

126932778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

126932778 is an abundant number, since it is smaller than the sum of its proper divisors (214416342).

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

126932778 is a wasteful number, since it uses less digits than its factorization.

126932778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19788 (or 19782 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 126932778 is about 11266.4447808526. Note that the first 3 decimals coincide. The cubic root of 126932778 is about 502.5638680237.

The spelling of 126932778 in words is "one hundred twenty-six million, nine hundred thirty-two thousand, seven hundred seventy-eight".