11978402 has 8 divisors (see below), whose sum is σ = 17982912. Its totient is φ = 5984100.

The previous prime is 11978401. The next prime is 11978411. The reversal of 11978402 is 20487911.

11978402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×11978402² = 286964228947208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11978401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2027 + ... + 5297.

It is an arithmetic number, because the mean of its divisors is an integer number (2247864).

Almost surely, 2^11978402 is an apocalyptic number.

11978402 is a deficient number, since it is larger than the sum of its proper divisors (6004510).

11978402 is a wasteful number, since it uses less digits than its factorization.

11978402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5104.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 11978402 is about 3460.9828083942. The cubic root of 11978402 is about 228.8054130339.

The spelling of 11978402 in words is "eleven million, nine hundred seventy-eight thousand, four hundred two".