780034981 has 8 divisors (see below), whose sum is σ = 851158944. Its totient is φ = 708946320.

The previous prime is 780034967. The next prime is 780034993. The reversal of 780034981 is 189430087.

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

It is a cyclic number.

It is not a de Polignac number, because 780034981 - 2⁹ = 780034469 is a prime.

It is a super-2 number, since 2×780034981² = 1216909143167340722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780037981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62446 + ... + 73888.

It is an arithmetic number, because the mean of its divisors is an integer number (106394868).

Almost surely, 2^780034981 is an apocalyptic number.

It is an amenable number.

780034981 is a deficient number, since it is larger than the sum of its proper divisors (71123963).

780034981 is a wasteful number, since it uses less digits than its factorization.

780034981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17651.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 780034981 is about 27929.1063408767. The cubic root of 780034981 is about 920.5301689794.

The spelling of 780034981 in words is "seven hundred eighty million, thirty-four thousand, nine hundred eighty-one".