902340639 has 24 divisors (see below), whose sum is σ = 1336338432. Its totient is φ = 586450320.

The previous prime is 902340629. The next prime is 902340643. The reversal of 902340639 is 936043209.

It is a happy number.

It is not a de Polignac number, because 902340639 - 2¹⁹ = 901816351 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (902340629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107194 + ... + 115304.

It is an arithmetic number, because the mean of its divisors is an integer number (55680768).

Almost surely, 2^902340639 is an apocalyptic number.

902340639 is a deficient number, since it is larger than the sum of its proper divisors (433997793).

902340639 is a wasteful number, since it uses less digits than its factorization.

902340639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8427 (or 8424 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 902340639 is about 30038.9853190816. The cubic root of 902340639 is about 966.3256460321.

The spelling of 902340639 in words is "nine hundred two million, three hundred forty thousand, six hundred thirty-nine".