427720724 has 24 divisors (see below), whose sum is σ = 766637928. Its totient is φ = 208742400.

The previous prime is 427720717. The next prime is 427720747. The reversal of 427720724 is 427027724.

It can be written as a sum of positive squares in 4 ways, for example, as 14899600 + 412821124 = 3860^2 + 20318^2 .

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, 20774 + ... + 35874.

It is an arithmetic number, because the mean of its divisors is an integer number (31943247).

Almost surely, 2^427720724 is an apocalyptic number.

It is an amenable number.

427720724 is a deficient number, since it is larger than the sum of its proper divisors (338917204).

427720724 is a wasteful number, since it uses less digits than its factorization.

427720724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15275 (or 15273 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 35.

The square root of 427720724 is about 20681.4101066634. The cubic root of 427720724 is about 753.4482544982.

The spelling of 427720724 in words is "four hundred twenty-seven million, seven hundred twenty thousand, seven hundred twenty-four".