84402621 has 8 divisors (see below), whose sum is σ = 125040960. Its totient is φ = 56268396.

The previous prime is 84402613. The next prime is 84402623. The reversal of 84402621 is 12620448.

It is not a de Polignac number, because 84402621 - 2³ = 84402613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3126023 = 84402621 / (8 + 4 + 4 + 0 + 2 + 6 + 2 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84402623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1562985 + ... + 1563038.

It is an arithmetic number, because the mean of its divisors is an integer number (15630120).

Almost surely, 2^84402621 is an apocalyptic number.

It is an amenable number.

84402621 is a deficient number, since it is larger than the sum of its proper divisors (40638339).

84402621 is a wasteful number, since it uses less digits than its factorization.

84402621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3126032 (or 3126026 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 84402621 is about 9187.0899092150. The cubic root of 84402621 is about 438.6505158327.

The spelling of 84402621 in words is "eighty-four million, four hundred two thousand, six hundred twenty-one".