990426135 has 32 divisors (see below), whose sum is σ = 1642975488. Its totient is φ = 509108480.

The previous prime is 990426131. The next prime is 990426149. The reversal of 990426135 is 531624099.

It is not a de Polignac number, because 990426135 - 2² = 990426131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 990426093 and 990426102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990426131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41344 + ... + 60746.

It is an arithmetic number, because the mean of its divisors is an integer number (51342984).

Almost surely, 2^990426135 is an apocalyptic number.

990426135 is a deficient number, since it is larger than the sum of its proper divisors (652549353).

990426135 is a wasteful number, since it uses less digits than its factorization.

990426135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19535.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 990426135 is about 31471.0364462310. The cubic root of 990426135 is about 996.7984728288.

The spelling of 990426135 in words is "nine hundred ninety million, four hundred twenty-six thousand, one hundred thirty-five".