3678780731 has 4 divisors (see below), whose sum is σ = 3689322000. Its totient is φ = 3668239464.

The previous prime is 3678780691. The next prime is 3678780733. The reversal of 3678780731 is 1370878763.

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

It is a cyclic number.

It is not a de Polignac number, because 3678780731 - 2¹⁸ = 3678518587 is a prime.

It is a super-2 number, since 2×3678780731² = 27066855333553788722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3678780731.

It is not an unprimeable number, because it can be changed into a prime (3678780733) 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, 5270111 + ... + 5270808.

It is an arithmetic number, because the mean of its divisors is an integer number (922330500).

Almost surely, 2^3678780731 is an apocalyptic number.

3678780731 is a deficient number, since it is larger than the sum of its proper divisors (10541269).

3678780731 is a wasteful number, since it uses less digits than its factorization.

3678780731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10541268.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The square root of 3678780731 is about 60652.9531927342. The cubic root of 3678780731 is about 1543.7179983947.

The spelling of 3678780731 in words is "three billion, six hundred seventy-eight million, seven hundred eighty thousand, seven hundred thirty-one".