84420510390 has 64 divisors (see below), whose sum is σ = 225715622400. Its totient is φ = 22452710112.

The previous prime is 84420510359. The next prime is 84420510397. The reversal of 84420510390 is 9301502448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84420510397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310162 + ... + 514821.

It is an arithmetic number, because the mean of its divisors is an integer number (3526806600).

Almost surely, 2^84420510390 is an apocalyptic number.

84420510390 is an abundant number, since it is smaller than the sum of its proper divisors (141295112010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84420510390 is a wasteful number, since it uses less digits than its factorization.

84420510390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825378 (or 825372 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 84420510390 in words is "eighty-four billion, four hundred twenty million, five hundred ten thousand, three hundred ninety".