1974640356 has 216 divisors, whose sum is σ = 5836509952. Its totient is φ = 579700800.

The previous prime is 1974640351. The next prime is 1974640399. The reversal of 1974640356 is 6530464791.

1974640356 is a `hidden beast` number, since 197 + 4 + 6 + 403 + 56 = 666.

It is not an unprimeable number, because it can be changed into a prime (1974640351) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 27811801 + ... + 27811871.

Almost surely, 2^1974640356 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 1974640356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2918254976).

1974640356 is an abundant number, since it is smaller than the sum of its proper divisors (3861869596).

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

1974640356 is a wasteful number, since it uses less digits than its factorization.

1974640356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 1974640356 is about 44436.9255912242. The cubic root of 1974640356 is about 1254.5731909489.

The spelling of 1974640356 in words is "one billion, nine hundred seventy-four million, six hundred forty thousand, three hundred fifty-six".