7908921402 has 16 divisors (see below), whose sum is σ = 16203644352. Its totient is φ = 2572006880.

The previous prime is 7908921379. The next prime is 7908921409. The reversal of 7908921402 is 2041298097.

It is not an unprimeable number, because it can be changed into a prime (7908921409) 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, 16074798 + ... + 16075289.

It is an arithmetic number, because the mean of its divisors is an integer number (1012727772).

Almost surely, 2^7908921402 is an apocalyptic number.

7908921402 is an abundant number, since it is smaller than the sum of its proper divisors (8294722950).

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

7908921402 is a wasteful number, since it uses less digits than its factorization.

7908921402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32150133.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 7908921402 is about 88932.1168195158. The cubic root of 7908921402 is about 1992.3811300985.

The spelling of 7908921402 in words is "seven billion, nine hundred eight million, nine hundred twenty-one thousand, four hundred two".