781426490 has 64 divisors (see below), whose sum is σ = 1601994240. Its totient is φ = 272056320.

The previous prime is 781426463. The next prime is 781426537. The reversal of 781426490 is 94624187.

It is a super-2 number, since 2×781426490² = 1221254718547440200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 634175 + ... + 635405.

It is an arithmetic number, because the mean of its divisors is an integer number (25031160).

Almost surely, 2^781426490 is an apocalyptic number.

781426490 is an abundant number, since it is smaller than the sum of its proper divisors (820567750).

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

781426490 is a wasteful number, since it uses less digits than its factorization.

781426490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 781426490 is about 27954.0066895606. The cubic root of 781426490 is about 921.0772235416.

The spelling of 781426490 in words is "seven hundred eighty-one million, four hundred twenty-six thousand, four hundred ninety".