401620611 has 24 divisors (see below), whose sum is σ = 633493440. Its totient is φ = 225602832.

The previous prime is 401620603. The next prime is 401620627. The reversal of 401620611 is 116026104.

It is not a de Polignac number, because 401620611 - 2³ = 401620603 is a prime.

It is a super-2 number, since 2×401620611² = 322598230360026642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (401620691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14481 + ... + 31826.

It is an arithmetic number, because the mean of its divisors is an integer number (26395560).

Almost surely, 2^401620611 is an apocalyptic number.

401620611 is a deficient number, since it is larger than the sum of its proper divisors (231872829).

401620611 is a wasteful number, since it uses less digits than its factorization.

401620611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46383 (or 46376 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 401620611 is about 20040.4743207340. The cubic root of 401620611 is about 737.8000225640.

Adding to 401620611 its reverse (116026104), we get a palindrome (517646715).

The spelling of 401620611 in words is "four hundred one million, six hundred twenty thousand, six hundred eleven".