1064939778 has 64 divisors (see below), whose sum is σ = 2846976000. Its totient is φ = 288252432.

The previous prime is 1064939749. The next prime is 1064939867. The reversal of 1064939778 is 8779394601.

It is a happy number.

It is a super-2 number, since 2×1064939778² = 2268193461533378568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 66958 + ... + 81321.

It is an arithmetic number, because the mean of its divisors is an integer number (44484000).

Almost surely, 2^1064939778 is an apocalyptic number.

1064939778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1064939778 is an abundant number, since it is smaller than the sum of its proper divisors (1782036222).

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

1064939778 is a wasteful number, since it uses less digits than its factorization.

1064939778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148316 (or 148310 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The square root of 1064939778 is about 32633.4150526726. The cubic root of 1064939778 is about 1021.1942240847.

The spelling of 1064939778 in words is "one billion, sixty-four million, nine hundred thirty-nine thousand, seven hundred seventy-eight".