401215772 has 12 divisors (see below), whose sum is σ = 732655056. Its totient is φ = 191885760.

The previous prime is 401215747. The next prime is 401215781. The reversal of 401215772 is 277512104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2180429 + ... + 2180612.

It is an arithmetic number, because the mean of its divisors is an integer number (61054588).

Almost surely, 2^401215772 is an apocalyptic number.

It is an amenable number.

401215772 is a deficient number, since it is larger than the sum of its proper divisors (331439284).

401215772 is a wasteful number, since it uses less digits than its factorization.

401215772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4361068 (or 4361066 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 401215772 is about 20030.3712396950. The cubic root of 401215772 is about 737.5520350913.

Adding to 401215772 its reverse (277512104), we get a palindrome (678727876).

The spelling of 401215772 in words is "four hundred one million, two hundred fifteen thousand, seven hundred seventy-two".