671295420 has 36 divisors (see below), whose sum is σ = 2036263320. Its totient is φ = 179012064.

The previous prime is 671295397. The next prime is 671295431. The reversal of 671295420 is 24592176.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1864530 + ... + 1864889.

It is an arithmetic number, because the mean of its divisors is an integer number (56562870).

Almost surely, 2^671295420 is an apocalyptic number.

671295420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671295420 is an abundant number, since it is smaller than the sum of its proper divisors (1364967900).

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

671295420 is a wasteful number, since it uses less digits than its factorization.

671295420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3729434 (or 3729429 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 671295420 is about 25909.3693477861. The cubic root of 671295420 is about 875.5975977528.

The spelling of 671295420 in words is "six hundred seventy-one million, two hundred ninety-five thousand, four hundred twenty".