621401036 has 6 divisors (see below), whose sum is σ = 1087451820. Its totient is φ = 310700516.

The previous prime is 621401021. The next prime is 621401047. The reversal of 621401036 is 630104126.

It is a happy number.

It is a super-2 number, since 2×621401036² = 772278495083746592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77675126 + ... + 77675133.

It is an arithmetic number, because the mean of its divisors is an integer number (181241970).

Almost surely, 2^621401036 is an apocalyptic number.

It is an amenable number.

621401036 is a deficient number, since it is larger than the sum of its proper divisors (466050784).

621401036 is a wasteful number, since it uses less digits than its factorization.

621401036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155350263 (or 155350261 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 621401036 is about 24927.9168002463. The cubic root of 621401036 is about 853.3437087090.

The spelling of 621401036 in words is "six hundred twenty-one million, four hundred one thousand, thirty-six".