648949794 has 16 divisors (see below), whose sum is σ = 1298503200. Its totient is φ = 216216000.

The previous prime is 648949793. The next prime is 648949799. The reversal of 648949794 is 497949846.

It is a happy number.

It is a super-2 number, since 2×648949794² = 842271670265284872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648949793) 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, 10519 + ... + 37530.

It is an arithmetic number, because the mean of its divisors is an integer number (81156450).

Almost surely, 2^648949794 is an apocalyptic number.

648949794 is an abundant number, since it is smaller than the sum of its proper divisors (649553406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648949794 is a wasteful number, since it uses less digits than its factorization.

648949794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50305.

The product of its digits is 15676416, while the sum is 60.

The square root of 648949794 is about 25474.4930077126. The cubic root of 648949794 is about 865.7723259068.

The spelling of 648949794 in words is "six hundred forty-eight million, nine hundred forty-nine thousand, seven hundred ninety-four".