188402435540 has 48 divisors (see below), whose sum is σ = 454329328320. Its totient is φ = 64904186880.

The previous prime is 188402435531. The next prime is 188402435593. The reversal of 188402435540 is 45534204881.

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 = 188402435491 and 188402435500.

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, 22531997 + ... + 22540356.

It is an arithmetic number, because the mean of its divisors is an integer number (9465194340).

Almost surely, 2^188402435540 is an apocalyptic number.

188402435540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188402435540 is an abundant number, since it is smaller than the sum of its proper divisors (265926892780).

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

188402435540 is a wasteful number, since it uses less digits than its factorization.

188402435540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45072392 (or 45072390 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 44.

The spelling of 188402435540 in words is "one hundred eighty-eight billion, four hundred two million, four hundred thirty-five thousand, five hundred forty".