1978017496 has 192 divisors, whose sum is σ = 5056128000. Its totient is φ = 716325120.

The previous prime is 1978017493. The next prime is 1978017523. The reversal of 1978017496 is 6947108791.

It is a super-2 number, since 2×1978017496² = 7825106428964220032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978017491) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 3001215 + ... + 3001873.

It is an arithmetic number, because the mean of its divisors is an integer number (26334000).

Almost surely, 2^1978017496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1978017496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2528064000).

1978017496 is an abundant number, since it is smaller than the sum of its proper divisors (3078110504).

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

1978017496 is a wasteful number, since it uses less digits than its factorization.

1978017496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 52.

The square root of 1978017496 is about 44474.9086114856. The cubic root of 1978017496 is about 1255.2879972694.

The spelling of 1978017496 in words is "one billion, nine hundred seventy-eight million, seventeen thousand, four hundred ninety-six".