1157821400 has 24 divisors (see below), whose sum is σ = 2691935220. Its totient is φ = 463128480.

The previous prime is 1157821339. The next prime is 1157821409. The reversal of 1157821400 is 41287511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157821409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2894354 + ... + 2894753.

Almost surely, 2^1157821400 is an apocalyptic number.

1157821400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1157821400 is an abundant number, since it is smaller than the sum of its proper divisors (1534113820).

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

1157821400 is a wasteful number, since it uses less digits than its factorization.

1157821400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5789123 (or 5789114 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 1157821400 is about 34026.7747516570. The cubic root of 1157821400 is about 1050.0593768387.

The spelling of 1157821400 in words is "one billion, one hundred fifty-seven million, eight hundred twenty-one thousand, four hundred".