401336464 has 10 divisors (see below), whose sum is σ = 777589430. Its totient is φ = 200668224.

The previous prime is 401336461. The next prime is 401336471. The reversal of 401336464 is 464633104.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 380250000 + 21086464 = 19500^2 + 4592^2 .

It is a super-2 number, since 2×401336464² = 322141914672046592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401336461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12541749 + ... + 12541780.

It is an arithmetic number, because the mean of its divisors is an integer number (77758943).

Almost surely, 2^401336464 is an apocalyptic number.

It is an amenable number.

401336464 is a deficient number, since it is larger than the sum of its proper divisors (376252966).

401336464 is a wasteful number, since it uses less digits than its factorization.

401336464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25083537 (or 25083531 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 401336464 is about 20033.3837381507. The cubic root of 401336464 is about 737.6259834188.

Adding to 401336464 its reverse (464633104), we get a palindrome (865969568).

The spelling of 401336464 in words is "four hundred one million, three hundred thirty-six thousand, four hundred sixty-four".