102494778 has 32 divisors (see below), whose sum is σ = 216483840. Its totient is φ = 32261040.

The previous prime is 102494761. The next prime is 102494779. The reversal of 102494778 is 877494201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (102494779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38263 + ... + 40853.

It is an arithmetic number, because the mean of its divisors is an integer number (6765120).

Almost surely, 2^102494778 is an apocalyptic number.

102494778 is an abundant number, since it is smaller than the sum of its proper divisors (113989062).

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

102494778 is a wasteful number, since it uses less digits than its factorization.

102494778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 102494778 is about 10123.9704661758. The cubic root of 102494778 is about 467.9871334764.

The spelling of 102494778 in words is "one hundred two million, four hundred ninety-four thousand, seven hundred seventy-eight".