1140447778 has 16 divisors (see below), whose sum is σ = 1842633216. Its totient is φ = 527836320.

The previous prime is 1140447767. The next prime is 1140447779. The reversal of 1140447778 is 8777440411.

It is a super-2 number, since 2×1140447778² = 2601242268690274568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1140447779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398451 + ... + 401302.

It is an arithmetic number, because the mean of its divisors is an integer number (115164576).

Almost surely, 2^1140447778 is an apocalyptic number.

1140447778 is a deficient number, since it is larger than the sum of its proper divisors (702185438).

1140447778 is a wasteful number, since it uses less digits than its factorization.

1140447778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799809.

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 1140447778 is about 33770.5164011449. The cubic root of 1140447778 is about 1044.7806833536.

The spelling of 1140447778 in words is "one billion, one hundred forty million, four hundred forty-seven thousand, seven hundred seventy-eight".