781538034 has 16 divisors (see below), whose sum is σ = 1564147872. Its totient is φ = 260334048.

The previous prime is 781538011. The next prime is 781538063. The reversal of 781538034 is 430835187.

It is a super-2 number, since 2×781538034² = 1221603397177170312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781537983 and 781538001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35019 + ... + 52814.

It is an arithmetic number, because the mean of its divisors is an integer number (97759242).

Almost surely, 2^781538034 is an apocalyptic number.

781538034 is an abundant number, since it is smaller than the sum of its proper divisors (782609838).

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

781538034 is a wasteful number, since it uses less digits than its factorization.

781538034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89321.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 781538034 is about 27956.0017527543. The cubic root of 781538034 is about 921.1210475613.

The spelling of 781538034 in words is "seven hundred eighty-one million, five hundred thirty-eight thousand, thirty-four".