981511402 has 16 divisors (see below), whose sum is σ = 1490080320. Its totient is φ = 484827552.

The previous prime is 981511393. The next prime is 981511403. The reversal of 981511402 is 204115189.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (981511403) 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, 390883 + ... + 393385.

It is an arithmetic number, because the mean of its divisors is an integer number (93130020).

Almost surely, 2^981511402 is an apocalyptic number.

981511402 is a deficient number, since it is larger than the sum of its proper divisors (508568918).

981511402 is a wasteful number, since it uses less digits than its factorization.

981511402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 981511402 is about 31329.0823676660. The cubic root of 981511402 is about 993.7987580892.

The spelling of 981511402 in words is "nine hundred eighty-one million, five hundred eleven thousand, four hundred two".