1496721978 has 48 divisors (see below), whose sum is σ = 3301421760. Its totient is φ = 489950208.

The previous prime is 1496721953. The next prime is 1496722013. The reversal of 1496721978 is 8791276941.

1496721978 is a `hidden beast` number, since 1 + 496 + 72 + 19 + 78 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (1524096) is a multiple of the sum of its prime divisors (3888).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 431226 + ... + 434682.

It is an arithmetic number, because the mean of its divisors is an integer number (68779620).

Almost surely, 2^1496721978 is an apocalyptic number.

1496721978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1496721978 is an abundant number, since it is smaller than the sum of its proper divisors (1804699782).

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

1496721978 is a wasteful number, since it uses less digits than its factorization.

1496721978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3891 (or 3888 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 1496721978 is about 38687.4912342478. The cubic root of 1496721978 is about 1143.8797680586.

The spelling of 1496721978 in words is "one billion, four hundred ninety-six million, seven hundred twenty-one thousand, nine hundred seventy-eight".