620406589440 has 192 divisors, whose sum is σ = 2165255426880. Its totient is φ = 150401515520.

The previous prime is 620406589409. The next prime is 620406589477. The reversal of 620406589440 is 44985604026.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 620406589440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580059 + ... + 1255898.

It is an arithmetic number, because the mean of its divisors is an integer number (11277372015).

Almost surely, 2^620406589440 is an apocalyptic number.

620406589440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620406589440 is an abundant number, since it is smaller than the sum of its proper divisors (1544848837440).

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

620406589440 is a wasteful number, since it uses less digits than its factorization.

620406589440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835998 (or 1835978 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 620406589440 in words is "six hundred twenty billion, four hundred six million, five hundred eighty-nine thousand, four hundred forty".