1978537050 has 192 divisors, whose sum is σ = 6502440960. Its totient is φ = 432527040.

The previous prime is 1978537021. The next prime is 1978537063. The reversal of 1978537050 is 507358791.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1978536987 and 1978537005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 212799 + ... + 221901.

It is an arithmetic number, because the mean of its divisors is an integer number (33866880).

Almost surely, 2^1978537050 is an apocalyptic number.

1978537050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1978537050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3251220480).

1978537050 is an abundant number, since it is smaller than the sum of its proper divisors (4523903910).

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

1978537050 is a wasteful number, since it uses less digits than its factorization.

1978537050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9154 (or 9143 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 45.

The square root of 1978537050 is about 44480.7492068198. The cubic root of 1978537050 is about 1255.3978939728.

The spelling of 1978537050 in words is "one billion, nine hundred seventy-eight million, five hundred thirty-seven thousand, fifty".