1090457780 has 24 divisors (see below), whose sum is σ = 2306441760. Its totient is φ = 433044000.

The previous prime is 1090457749. The next prime is 1090457789. The reversal of 1090457780 is 877540901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090457789) 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, 193346 + ... + 198905.

It is an arithmetic number, because the mean of its divisors is an integer number (96101740).

Almost surely, 2^1090457780 is an apocalyptic number.

1090457780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1090457780 is an abundant number, since it is smaller than the sum of its proper divisors (1215983980).

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

1090457780 is a wasteful number, since it uses less digits than its factorization.

1090457780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392399 (or 392397 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 1090457780 is about 33022.0801888676. The cubic root of 1090457780 is about 1029.2865200577.

The spelling of 1090457780 in words is "one billion, ninety million, four hundred fifty-seven thousand, seven hundred eighty".