126400390 has 16 divisors (see below), whose sum is σ = 232362432. Its totient is φ = 49484224.

The previous prime is 126400367. The next prime is 126400397. The reversal of 126400390 is 93004621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126400397) 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, 133999 + ... + 134938.

It is an arithmetic number, because the mean of its divisors is an integer number (14522652).

Almost surely, 2^126400390 is an apocalyptic number.

126400390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126400390 is a deficient number, since it is larger than the sum of its proper divisors (105962042).

126400390 is a wasteful number, since it uses less digits than its factorization.

126400390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268991.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 126400390 is about 11242.7928025024. The cubic root of 126400390 is about 501.8602569713.

The spelling of 126400390 in words is "one hundred twenty-six million, four hundred thousand, three hundred ninety".