1031402400 has 432 divisors, whose sum is σ = 4028117184. Its totient is φ = 224501760.

The previous prime is 1031402381. The next prime is 1031402443. The reversal of 1031402400 is 42041301.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1031402400.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 14128764 + ... + 14128836.

Almost surely, 2^1031402400 is an apocalyptic number.

1031402400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1031402400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2014058592).

1031402400 is an abundant number, since it is smaller than the sum of its proper divisors (2996714784).

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

1031402400 is a wasteful number, since it uses less digits than its factorization.

1031402400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1031402400 is about 32115.4542237845. The cubic root of 1031402400 is about 1010.3597711873.

Adding to 1031402400 its reverse (42041301), we get a palindrome (1073443701).

The spelling of 1031402400 in words is "one billion, thirty-one million, four hundred two thousand, four hundred".