1978415352 has 48 divisors (see below), whose sum is σ = 5364627840. Its totient is φ = 658681728.

The previous prime is 1978415347. The next prime is 1978415377. The reversal of 1978415352 is 2535148791.

1978415352 is a `hidden beast` number, since 1 + 9 + 78 + 41 + 535 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1978415298 and 1978415307.

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, 45673 + ... + 77735.

It is an arithmetic number, because the mean of its divisors is an integer number (111763080).

Almost surely, 2^1978415352 is an apocalyptic number.

1978415352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1978415352 is an abundant number, since it is smaller than the sum of its proper divisors (3386212488).

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

1978415352 is a wasteful number, since it uses less digits than its factorization.

1978415352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32932 (or 32925 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 1978415352 is about 44479.3812007316. The cubic root of 1978415352 is about 1255.3721539872.

The spelling of 1978415352 in words is "one billion, nine hundred seventy-eight million, four hundred fifteen thousand, three hundred fifty-two".