191942646 has 32 divisors (see below), whose sum is σ = 444019968. Its totient is φ = 54179040.

The previous prime is 191942629. The next prime is 191942657. The reversal of 191942646 is 646249191.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 191942598 and 191942607.

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, 24045 + ... + 31016.

It is an arithmetic number, because the mean of its divisors is an integer number (13875624).

Almost surely, 2^191942646 is an apocalyptic number.

191942646 is an abundant number, since it is smaller than the sum of its proper divisors (252077322).

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

191942646 is a wasteful number, since it uses less digits than its factorization.

191942646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55156.

The product of its digits is 93312, while the sum is 42.

The square root of 191942646 is about 13854.3367217633. The cubic root of 191942646 is about 576.8423788037.

The spelling of 191942646 in words is "one hundred ninety-one million, nine hundred forty-two thousand, six hundred forty-six".