620401405 has 16 divisors (see below), whose sum is σ = 805795200. Its totient is φ = 455830848.

The previous prime is 620401399. The next prime is 620401409. The reversal of 620401405 is 504104026.

It is a cyclic number.

It is not a de Polignac number, because 620401405 - 2¹¹ = 620399357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620401409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11047 + ... + 36916.

It is an arithmetic number, because the mean of its divisors is an integer number (50362200).

Almost surely, 2^620401405 is an apocalyptic number.

620401405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

620401405 is a deficient number, since it is larger than the sum of its proper divisors (185393795).

620401405 is a wasteful number, since it uses less digits than its factorization.

620401405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48180.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 620401405 is about 24907.8582981356. The cubic root of 620401405 is about 852.8858794922.

The spelling of 620401405 in words is "six hundred twenty million, four hundred one thousand, four hundred five".