425400820 has 24 divisors (see below), whose sum is σ = 962060904. Its totient is φ = 157070976.

The previous prime is 425400799. The next prime is 425400841. The reversal of 425400820 is 28004524.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (425400799) and next prime (425400841).

It can be written as a sum of positive squares in 4 ways, for example, as 47720464 + 377680356 = 6908^2 + 19434^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817819 + ... + 818338.

It is an arithmetic number, because the mean of its divisors is an integer number (40085871).

Almost surely, 2^425400820 is an apocalyptic number.

It is an amenable number.

425400820 is an abundant number, since it is smaller than the sum of its proper divisors (536660084).

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

425400820 is a wasteful number, since it uses less digits than its factorization.

425400820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636179 (or 1636177 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 425400820 is about 20625.2471500343. The cubic root of 425400820 is about 752.0835810413.

The spelling of 425400820 in words is "four hundred twenty-five million, four hundred thousand, eight hundred twenty".