747985402 has 4 divisors (see below), whose sum is σ = 1121978106. Its totient is φ = 373992700.

The previous prime is 747985379. The next prime is 747985439. The reversal of 747985402 is 204589747.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 420701121 + 327284281 = 20511^2 + 18091^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186996349 + ... + 186996352.

Almost surely, 2^747985402 is an apocalyptic number.

747985402 is a deficient number, since it is larger than the sum of its proper divisors (373992704).

747985402 is a wasteful number, since it uses less digits than its factorization.

747985402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373992703.

The product of its (nonzero) digits is 564480, while the sum is 46.

The square root of 747985402 is about 27349.3217831814. The cubic root of 747985402 is about 907.7460630430.

It can be divided in two parts, 74798 and 5402, that added together give a triangular number (80200 = T₄₀₀).

The spelling of 747985402 in words is "seven hundred forty-seven million, nine hundred eighty-five thousand, four hundred two".