128222950 has 12 divisors (see below), whose sum is σ = 238494780. Its totient is φ = 51289160.

The previous prime is 128222933. The next prime is 128222977. The reversal of 128222950 is 59222821.

It is a super-2 number, since 2×128222950² = 32882249813405000, 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 5 ways as a sum of consecutive naturals, for example, 1282180 + ... + 1282279.

It is an arithmetic number, because the mean of its divisors is an integer number (19874565).

Almost surely, 2^128222950 is an apocalyptic number.

128222950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128222950 is a deficient number, since it is larger than the sum of its proper divisors (110271830).

128222950 is a wasteful number, since it uses less digits than its factorization.

128222950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564471 (or 2564466 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 128222950 is about 11323.5573032506. The cubic root of 128222950 is about 504.2608537765.

The spelling of 128222950 in words is "one hundred twenty-eight million, two hundred twenty-two thousand, nine hundred fifty".