620258405 has 16 divisors (see below), whose sum is σ = 802119024. Its totient is φ = 457720320.

The previous prime is 620258381. The next prime is 620258423. The reversal of 620258405 is 504852026.

It can be written as a sum of positive squares in 8 ways, for example, as 9229444 + 611028961 = 3038^2 + 24719^2 .

It is not a de Polignac number, because 620258405 - 2⁶ = 620258341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136937 + ... + 141393.

It is an arithmetic number, because the mean of its divisors is an integer number (50132439).

Almost surely, 2^620258405 is an apocalyptic number.

620258405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

620258405 is a deficient number, since it is larger than the sum of its proper divisors (181860619).

620258405 is a wasteful number, since it uses less digits than its factorization.

620258405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6616.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 620258405 is about 24904.9875526972. The cubic root of 620258405 is about 852.8203455483.

The spelling of 620258405 in words is "six hundred twenty million, two hundred fifty-eight thousand, four hundred five".