620135400 has 48 divisors (see below), whose sum is σ = 1922421600. Its totient is φ = 165369280.

The previous prime is 620135381. The next prime is 620135419. The reversal of 620135400 is 4531026.

It is a happy number.

620135400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (620135381) and next prime (620135419).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 516180 + ... + 517379.

It is an arithmetic number, because the mean of its divisors is an integer number (40050450).

Almost surely, 2^620135400 is an apocalyptic number.

620135400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620135400 is an abundant number, since it is smaller than the sum of its proper divisors (1302286200).

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

620135400 is a wasteful number, since it uses less digits than its factorization.

620135400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033578 (or 1033569 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 620135400 is about 24902.5179449790. The cubic root of 620135400 is about 852.7639668407.

Adding to 620135400 its reverse (4531026), we get a palindrome (624666426).

The spelling of 620135400 in words is "six hundred twenty million, one hundred thirty-five thousand, four hundred".