620406457 has 8 divisors (see below), whose sum is σ = 677911392. Its totient is φ = 563085600.

The previous prime is 620406443. The next prime is 620406461. The reversal of 620406457 is 754604026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 620406457 - 2²³ = 612017849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620406427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38919 + ... + 52492.

It is an arithmetic number, because the mean of its divisors is an integer number (84738924).

Almost surely, 2^620406457 is an apocalyptic number.

It is an amenable number.

620406457 is a deficient number, since it is larger than the sum of its proper divisors (57504935).

620406457 is a wasteful number, since it uses less digits than its factorization.

620406457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92039.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 620406457 is about 24907.9597117066. The cubic root of 620406457 is about 852.8881945352. Note that the first 3 decimals are identical.

The spelling of 620406457 in words is "six hundred twenty million, four hundred six thousand, four hundred fifty-seven".