621802492 has 6 divisors (see below), whose sum is σ = 1088154368. Its totient is φ = 310901244.

The previous prime is 621802471. The next prime is 621802499. The reversal of 621802492 is 294208126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621802499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77725308 + ... + 77725315.

Almost surely, 2^621802492 is an apocalyptic number.

It is an amenable number.

621802492 is a deficient number, since it is larger than the sum of its proper divisors (466351876).

621802492 is a wasteful number, since it uses less digits than its factorization.

621802492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155450627 (or 155450625 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 621802492 is about 24935.9678376437. The cubic root of 621802492 is about 853.5274366528.

The spelling of 621802492 in words is "six hundred twenty-one million, eight hundred two thousand, four hundred ninety-two".