400220615 has 8 divisors (see below), whose sum is σ = 483720720. Its totient is φ = 317872512.

The previous prime is 400220603. The next prime is 400220657. The reversal of 400220615 is 516022004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400220615 - 2⁴ = 400220599 is a prime.

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, 287234 + ... + 288623.

It is an arithmetic number, because the mean of its divisors is an integer number (60465090).

Almost surely, 2^400220615 is an apocalyptic number.

400220615 is a deficient number, since it is larger than the sum of its proper divisors (83500105).

400220615 is a wasteful number, since it uses less digits than its factorization.

400220615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576001.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 400220615 is about 20005.5146147256. The cubic root of 400220615 is about 736.9417336004.

Adding to 400220615 its reverse (516022004), we get a palindrome (916242619).

The spelling of 400220615 in words is "four hundred million, two hundred twenty thousand, six hundred fifteen".