101982778 has 8 divisors (see below), whose sum is σ = 154179072. Its totient is φ = 50589756.

The previous prime is 101982761. The next prime is 101982781. The reversal of 101982778 is 877289101.

It is a happy number.

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, 200500 + ... + 201007.

It is an arithmetic number, because the mean of its divisors is an integer number (19272384).

Almost surely, 2^101982778 is an apocalyptic number.

101982778 is a deficient number, since it is larger than the sum of its proper divisors (52196294).

101982778 is a wasteful number, since it uses less digits than its factorization.

101982778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401636.

The product of its (nonzero) digits is 56448, while the sum is 43.

The square root of 101982778 is about 10098.6522863202. The cubic root of 101982778 is about 467.2065750007.

The spelling of 101982778 in words is "one hundred one million, nine hundred eighty-two thousand, seven hundred seventy-eight".