781031426 has 32 divisors (see below), whose sum is σ = 1379617920. Its totient is φ = 324694656.

The previous prime is 781031369. The next prime is 781031431. The reversal of 781031426 is 624130187.

It is a super-2 number, since 2×781031426² = 1220020176799186952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781031392 and 781031401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60125 + ... + 71951.

It is an arithmetic number, because the mean of its divisors is an integer number (43113060).

Almost surely, 2^781031426 is an apocalyptic number.

781031426 is a deficient number, since it is larger than the sum of its proper divisors (598586494).

781031426 is a wasteful number, since it uses less digits than its factorization.

781031426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11978.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 781031426 is about 27946.9394746545. The cubic root of 781031426 is about 920.9219750753.

The spelling of 781031426 in words is "seven hundred eighty-one million, thirty-one thousand, four hundred twenty-six".