126778820 has 48 divisors (see below), whose sum is σ = 304915968. Its totient is φ = 43374720.

The previous prime is 126778793. The next prime is 126778823. The reversal of 126778820 is 28877621.

It is not an unprimeable number, because it can be changed into a prime (126778823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114389 + ... + 115491.

It is an arithmetic number, because the mean of its divisors is an integer number (6352416).

Almost surely, 2^126778820 is an apocalyptic number.

126778820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126778820 is an abundant number, since it is smaller than the sum of its proper divisors (178137148).

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

126778820 is a wasteful number, since it uses less digits than its factorization.

126778820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940 (or 1938 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 126778820 is about 11259.6101175840. The cubic root of 126778820 is about 502.3605976188.

The spelling of 126778820 in words is "one hundred twenty-six million, seven hundred seventy-eight thousand, eight hundred twenty".