620340902 has 4 divisors (see below), whose sum is σ = 930511356. Its totient is φ = 310170450.

The previous prime is 620340893. The next prime is 620340913. The reversal of 620340902 is 209043026.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155085224 + ... + 155085227.

It is an arithmetic number, because the mean of its divisors is an integer number (232627839).

Almost surely, 2^620340902 is an apocalyptic number.

620340902 is a deficient number, since it is larger than the sum of its proper divisors (310170454).

620340902 is a wasteful number, since it uses less digits than its factorization.

620340902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310170453.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 620340902 is about 24906.6437321450. The cubic root of 620340902 is about 852.8581534472.

Adding to 620340902 its reverse (209043026), we get a palindrome (829383928).

The spelling of 620340902 in words is "six hundred twenty million, three hundred forty thousand, nine hundred two".