421746788 has 6 divisors (see below), whose sum is σ = 738056886. Its totient is φ = 210873392.

The previous prime is 421746751. The next prime is 421746799. The reversal of 421746788 is 887647124.

It can be written as a sum of positive squares in only one way, i.e., 411197284 + 10549504 = 20278^2 + 3248^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52718345 + ... + 52718352.

It is an arithmetic number, because the mean of its divisors is an integer number (123009481).

Almost surely, 2^421746788 is an apocalyptic number.

It is an amenable number.

421746788 is a deficient number, since it is larger than the sum of its proper divisors (316310098).

421746788 is a wasteful number, since it uses less digits than its factorization.

421746788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105436701 (or 105436699 counting only the distinct ones).

The product of its digits is 602112, while the sum is 47.

The square root of 421746788 is about 20536.4745757396. The cubic root of 421746788 is about 749.9240148204.

The spelling of 421746788 in words is "four hundred twenty-one million, seven hundred forty-six thousand, seven hundred eighty-eight".