403873978 has 16 divisors (see below), whose sum is σ = 612371520. Its totient is φ = 199757376.

The previous prime is 403873973. The next prime is 403873999. The reversal of 403873978 is 879378304.

It is a super-2 number, since 2×403873978² = 326228380211088968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (403873973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138451 + ... + 141337.

It is an arithmetic number, because the mean of its divisors is an integer number (38273220).

Almost surely, 2^403873978 is an apocalyptic number.

403873978 is a deficient number, since it is larger than the sum of its proper divisors (208497542).

403873978 is a wasteful number, since it uses less digits than its factorization.

403873978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3621.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 403873978 is about 20096.6160833111. The cubic root of 403873978 is about 739.1773046015.

The spelling of 403873978 in words is "four hundred three million, eight hundred seventy-three thousand, nine hundred seventy-eight".