18428890040 has 64 divisors (see below), whose sum is σ = 45249636960. Its totient is φ = 6699179520.

The previous prime is 18428890009. The next prime is 18428890063. The reversal of 18428890040 is 4009882481.

It is a happy number.

It is a super-2 number, since 2×18428890040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 18428889973 and 18428890000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1912274 + ... + 1921886.

Almost surely, 2^18428890040 is an apocalyptic number.

18428890040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18428890040 is an abundant number, since it is smaller than the sum of its proper divisors (26820746920).

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

18428890040 is a wasteful number, since it uses less digits than its factorization.

18428890040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13992 (or 13988 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The spelling of 18428890040 in words is "eighteen billion, four hundred twenty-eight million, eight hundred ninety thousand, forty".