128400682 has 8 divisors (see below), whose sum is σ = 192767652. Its totient is φ = 64144800.

The previous prime is 128400653. The next prime is 128400691. The reversal of 128400682 is 286004821.

It can be written as a sum of positive squares in 2 ways, for example, as 117961321 + 10439361 = 10861^2 + 3231^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24819 + ... + 29542.

Almost surely, 2^128400682 is an apocalyptic number.

128400682 is a deficient number, since it is larger than the sum of its proper divisors (64366970).

128400682 is a wasteful number, since it uses less digits than its factorization.

128400682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55544.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 128400682 is about 11331.4024727745. The cubic root of 128400682 is about 504.4937343762.

The spelling of 128400682 in words is "one hundred twenty-eight million, four hundred thousand, six hundred eighty-two".