13402990 has 16 divisors (see below), whose sum is σ = 24639552. Its totient is φ = 5246944.

The previous prime is 13402979. The next prime is 13402993. The reversal of 13402990 is 9920431.

It is a happy number.

13402990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402993) 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, 13789 + ... + 14728.

It is an arithmetic number, because the mean of its divisors is an integer number (1539972).

Almost surely, 2^13402990 is an apocalyptic number.

13402990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13402990 is a deficient number, since it is larger than the sum of its proper divisors (11236562).

13402990 is a wasteful number, since it uses less digits than its factorization.

13402990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28571.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 13402990 is about 3661.0094236426. The cubic root of 13402990 is about 237.5384388384.

The spelling of 13402990 in words is "thirteen million, four hundred two thousand, nine hundred ninety".