128622998 has 16 divisors (see below), whose sum is σ = 222109344. Its totient is φ = 54720960.

The previous prime is 128622979. The next prime is 128623013. The reversal of 128622998 is 899226821.

It is a super-2 number, since 2×128622998² = 33087751229016008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31613 + ... + 35448.

It is an arithmetic number, because the mean of its divisors is an integer number (13881834).

Almost surely, 2^128622998 is an apocalyptic number.

128622998 is a deficient number, since it is larger than the sum of its proper divisors (93486346).

128622998 is a wasteful number, since it uses less digits than its factorization.

128622998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67207.

The product of its digits is 248832, while the sum is 47.

The square root of 128622998 is about 11341.2079603541. The cubic root of 128622998 is about 504.7847306519.

The spelling of 128622998 in words is "one hundred twenty-eight million, six hundred twenty-two thousand, nine hundred ninety-eight".