304779981 has 16 divisors (see below), whose sum is σ = 443685888. Its totient is φ = 184561200.

The previous prime is 304779971. The next prime is 304779983. The reversal of 304779981 is 189977403.

It is not a de Polignac number, because 304779981 - 2⁵ = 304779949 is a prime.

It is a super-2 number, since 2×304779981² = 185781673636720722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 304779981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304779983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45966 + ... + 52176.

It is an arithmetic number, because the mean of its divisors is an integer number (27730368).

Almost surely, 2^304779981 is an apocalyptic number.

It is an amenable number.

304779981 is a deficient number, since it is larger than the sum of its proper divisors (138905907).

304779981 is a wasteful number, since it uses less digits than its factorization.

304779981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7712.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 304779981 is about 17457.9489345112. The cubic root of 304779981 is about 672.9696509758.

It can be divided in two parts, 3047 and 79981, that added together give a triangular number (83028 = T₄₀₇).

The spelling of 304779981 in words is "three hundred four million, seven hundred seventy-nine thousand, nine hundred eighty-one".