1978029950 has 24 divisors (see below), whose sum is σ = 3962147448. Its totient is φ = 730349280.

The previous prime is 1978029947. The next prime is 1978029983. The reversal of 1978029950 is 599208791.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1520912 + ... + 1522211.

It is an arithmetic number, because the mean of its divisors is an integer number (165089477).

Almost surely, 2^1978029950 is an apocalyptic number.

1978029950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1978029950 is an abundant number, since it is smaller than the sum of its proper divisors (1984117498).

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

1978029950 is a wasteful number, since it uses less digits than its factorization.

1978029950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043148 (or 3043143 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 1978029950 is about 44475.0486227952. The cubic root of 1978029950 is about 1255.2906317800.

The spelling of 1978029950 in words is "one billion, nine hundred seventy-eight million, twenty-nine thousand, nine hundred fifty".