780149002 has 4 divisors (see below), whose sum is σ = 1170223506. Its totient is φ = 390074500.

The previous prime is 780148997. The next prime is 780149009. The reversal of 780149002 is 200941087.

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

It can be written as a sum of positive squares in only one way, i.e., 701667121 + 78481881 = 26489^2 + 8859^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (780149009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195037249 + ... + 195037252.

Almost surely, 2^780149002 is an apocalyptic number.

780149002 is a deficient number, since it is larger than the sum of its proper divisors (390074504).

780149002 is a wasteful number, since it uses less digits than its factorization.

780149002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390074503.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 780149002 is about 27931.1475238666. The cubic root of 780149002 is about 920.5750193854.

The spelling of 780149002 in words is "seven hundred eighty million, one hundred forty-nine thousand, two".