126990290 has 32 divisors (see below), whose sum is σ = 268303104. Its totient is φ = 42361920.

The previous prime is 126990277. The next prime is 126990301. The reversal of 126990290 is 92099621.

It is a super-2 number, since 2×126990290² = 32253067508568200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21926 + ... + 27105.

It is an arithmetic number, because the mean of its divisors is an integer number (8384472).

Almost surely, 2^126990290 is an apocalyptic number.

126990290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126990290 is an abundant number, since it is smaller than the sum of its proper divisors (141312814).

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

126990290 is a wasteful number, since it uses less digits than its factorization.

126990290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49082.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 126990290 is about 11268.9968497644. The cubic root of 126990290 is about 502.6397588205.

The spelling of 126990290 in words is "one hundred twenty-six million, nine hundred ninety thousand, two hundred ninety".