731420420 has 24 divisors (see below), whose sum is σ = 1536542784. Its totient is φ = 292461536.

The previous prime is 731420387. The next prime is 731420467. The reversal of 731420420 is 24024137.

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 7 ways as a sum of consecutive naturals, for example, 72527 + ... + 81993.

It is an arithmetic number, because the mean of its divisors is an integer number (64022616).

Almost surely, 2^731420420 is an apocalyptic number.

It is an amenable number.

731420420 is an abundant number, since it is smaller than the sum of its proper divisors (805122364).

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

731420420 is a wasteful number, since it uses less digits than its factorization.

731420420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13339 (or 13337 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 731420420 is about 27044.7854493246. The cubic root of 731420420 is about 900.9949572745.

Adding to 731420420 its reverse (24024137), we get a palindrome (755444557).

The spelling of 731420420 in words is "seven hundred thirty-one million, four hundred twenty thousand, four hundred twenty".