3540997994 has 8 divisors (see below), whose sum is σ = 5311778148. Its totient is φ = 1770405280.

The previous prime is 3540997969. The next prime is 3540997997. The reversal of 3540997994 is 4997990453.

It can be written as a sum of positive squares in 2 ways, for example, as 3496948225 + 44049769 = 59135^2 + 6637^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (3540997997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18734 + ... + 86214.

Almost surely, 2^3540997994 is an apocalyptic number.

3540997994 is a deficient number, since it is larger than the sum of its proper divisors (1770780154).

3540997994 is a wasteful number, since it uses less digits than its factorization.

3540997994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93720.

The product of its (nonzero) digits is 11022480, while the sum is 59.

The square root of 3540997994 is about 59506.2853318874. The cubic root of 3540997994 is about 1524.1997763863.

The spelling of 3540997994 in words is "three billion, five hundred forty million, nine hundred ninety-seven thousand, nine hundred ninety-four".