620427240 has 96 divisors (see below), whose sum is σ = 2135020680. Its totient is φ = 155713536.

The previous prime is 620427221. The next prime is 620427251. The reversal of 620427240 is 42724026.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 619113924 + 1313316 = 24882^2 + 1146^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44569 + ... + 56808.

Almost surely, 2^620427240 is an apocalyptic number.

620427240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620427240 is an abundant number, since it is smaller than the sum of its proper divisors (1514593440).

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

620427240 is a wasteful number, since it uses less digits than its factorization.

620427240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101411 (or 101404 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 620427240 is about 24908.3769041662. The cubic root of 620427240 is about 852.8977180646.

The spelling of 620427240 in words is "six hundred twenty million, four hundred twenty-seven thousand, two hundred forty".