1978615296 has 480 divisors, whose sum is σ = 7165255680. Its totient is φ = 536481792.

The previous prime is 1978615241. The next prime is 1978615333. The reversal of 1978615296 is 6925168791.

1978615296 is a `hidden beast` number, since 19 + 7 + 8 + 615 + 2 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (1632960) is a multiple of the sum of its prime divisors (162).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15579585 + ... + 15579711.

It is an arithmetic number, because the mean of its divisors is an integer number (14927616).

Almost surely, 2^1978615296 is an apocalyptic number.

1978615296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1978615296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3582627840).

1978615296 is an abundant number, since it is smaller than the sum of its proper divisors (5186640384).

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

1978615296 is a wasteful number, since it uses less digits than its factorization.

1978615296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 162 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 1978615296 is about 44481.6287471581. The cubic root of 1978615296 is about 1255.4144429964.

The spelling of 1978615296 in words is "one billion, nine hundred seventy-eight million, six hundred fifteen thousand, two hundred ninety-six".