111620478 has 48 divisors (see below), whose sum is σ = 243870480. Its totient is φ = 34013952.

The previous prime is 111620473. The next prime is 111620489. The reversal of 111620478 is 874026111.

It is a super-2 number, since 2×111620478² = 24918262217896968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111620471) 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, 61926 + ... + 63702.

It is an arithmetic number, because the mean of its divisors is an integer number (5080635).

Almost surely, 2^111620478 is an apocalyptic number.

111620478 is an abundant number, since it is smaller than the sum of its proper divisors (132250002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111620478 is a wasteful number, since it uses less digits than its factorization.

111620478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849 (or 1830 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 111620478 is about 10565.0592994076. The cubic root of 111620478 is about 481.4833712011.

Adding to 111620478 its reverse (874026111), we get a palindrome (985646589).

The spelling of 111620478 in words is "one hundred eleven million, six hundred twenty thousand, four hundred seventy-eight".