1102400020 has 24 divisors (see below), whose sum is σ = 2451219624. Its totient is φ = 415021056.

The previous prime is 1102400017. The next prime is 1102400023. The reversal of 1102400020 is 200042011.

It is an interprime number because it is at equal distance from previous prime (1102400017) and next prime (1102400023).

It can be written as a sum of positive squares in 4 ways, for example, as 360164484 + 742235536 = 18978^2 + 27244^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102400023) 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, 1620837 + ... + 1621516.

It is an arithmetic number, because the mean of its divisors is an integer number (102134151).

Almost surely, 2^1102400020 is an apocalyptic number.

1102400020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1102400020 is an abundant number, since it is smaller than the sum of its proper divisors (1348819604).

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

1102400020 is a wasteful number, since it uses less digits than its factorization.

1102400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3242379 (or 3242377 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1102400020 is about 33202.4098522984. The cubic root of 1102400020 is about 1033.0303255399.

Adding to 1102400020 its reverse (200042011), we get a palindrome (1302442031).

The spelling of 1102400020 in words is "one billion, one hundred two million, four hundred thousand, twenty".