781948 has 12 divisors (see below), whose sum is σ = 1375920. Its totient is φ = 388832.

The previous prime is 781919. The next prime is 781951. The reversal of 781948 is 849187.

It is a super-2 number, since 2×781948² = 1222885349408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (114660).

2⁷⁸¹⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

781948 is a deficient number, since it is larger than the sum of its proper divisors (593972).

781948 is a wasteful number, since it uses less digits than its factorization.

781948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076 (or 1074 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 781948 is about 884.2782367558. The cubic root of 781948 is about 92.1282081439.

The spelling of 781948 in words is "seven hundred eighty-one thousand, nine hundred forty-eight".