1978801274 has 8 divisors (see below), whose sum is σ = 3097254240. Its totient is φ = 946383196.

The previous prime is 1978801273. The next prime is 1978801301. The reversal of 1978801274 is 4721088791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1978801271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21508664 + ... + 21508755.

It is an arithmetic number, because the mean of its divisors is an integer number (387156780).

Almost surely, 2^1978801274 is an apocalyptic number.

1978801274 is a deficient number, since it is larger than the sum of its proper divisors (1118452966).

1978801274 is a wasteful number, since it uses less digits than its factorization.

1978801274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43017444.

The product of its (nonzero) digits is 225792, while the sum is 47.

The square root of 1978801274 is about 44483.7192015236. The cubic root of 1978801274 is about 1255.4537755796.

The spelling of 1978801274 in words is "one billion, nine hundred seventy-eight million, eight hundred one thousand, two hundred seventy-four".