126278890 has 16 divisors (see below), whose sum is σ = 240673032. Its totient is φ = 47540224.

The previous prime is 126278881. The next prime is 126278897. The reversal of 126278890 is 98872621.

It can be written as a sum of positive squares in 4 ways, for example, as 82573569 + 43705321 = 9087^2 + 6611^2 .

It is not an unprimeable number, because it can be changed into a prime (126278897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371239 + ... + 371578.

Almost surely, 2^126278890 is an apocalyptic number.

126278890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126278890 is a deficient number, since it is larger than the sum of its proper divisors (114394142).

126278890 is a wasteful number, since it uses less digits than its factorization.

126278890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742841.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 126278890 is about 11237.3880417115. The cubic root of 126278890 is about 501.6994041738.

The spelling of 126278890 in words is "one hundred twenty-six million, two hundred seventy-eight thousand, eight hundred ninety".