642692296 has 8 divisors (see below), whose sum is σ = 1205048070. Its totient is φ = 321346144.

The previous prime is 642692291. The next prime is 642692317. The reversal of 642692296 is 692296246.

It can be written as a sum of positive squares in only one way, i.e., 596043396 + 46648900 = 24414^2 + 6830^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (642692291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40168261 + ... + 40168276.

Almost surely, 2^642692296 is an apocalyptic number.

It is an amenable number.

642692296 is a deficient number, since it is larger than the sum of its proper divisors (562355774).

642692296 is a wasteful number, since it uses less digits than its factorization.

642692296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80336543 (or 80336539 counting only the distinct ones).

The product of its digits is 559872, while the sum is 46.

The square root of 642692296 is about 25351.3766095650. The cubic root of 642692296 is about 862.9805971271.

It can be divided in two parts, 64 and 2692296, that added together give a triangular number (2692360 = T₂₃₂₀).

The spelling of 642692296 in words is "six hundred forty-two million, six hundred ninety-two thousand, two hundred ninety-six".