826240642 has 4 divisors (see below), whose sum is σ = 1239360966. Its totient is φ = 413120320.

The previous prime is 826240621. The next prime is 826240663. The reversal of 826240642 is 246042628.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (826240621) and next prime (826240663).

It can be written as a sum of positive squares in only one way, i.e., 823747401 + 2493241 = 28701^2 + 1579^2 .

It is a junction number, because it is equal to n+sod(n) for n = 826240598 and 826240607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206560159 + ... + 206560162.

Almost surely, 2^826240642 is an apocalyptic number.

826240642 is a deficient number, since it is larger than the sum of its proper divisors (413120324).

826240642 is a wasteful number, since it uses less digits than its factorization.

826240642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413120323.

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 826240642 is about 28744.4019245487. The cubic root of 826240642 is about 938.3586272246.

The spelling of 826240642 in words is "eight hundred twenty-six million, two hundred forty thousand, six hundred forty-two".