1030400040 has 32 divisors (see below), whose sum is σ = 3091200480. Its totient is φ = 274773312.

The previous prime is 1030400017. The next prime is 1030400047. The reversal of 1030400040 is 400040301.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1030399989 and 1030400025.

It is not an unprimeable number, because it can be changed into a prime (1030400047) 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, 4293214 + ... + 4293453.

It is an arithmetic number, because the mean of its divisors is an integer number (96600015).

Almost surely, 2^1030400040 is an apocalyptic number.

1030400040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1030400040 is an abundant number, since it is smaller than the sum of its proper divisors (2060800440).

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

1030400040 is a wasteful number, since it uses less digits than its factorization.

1030400040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8586681 (or 8586677 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1030400040 is about 32099.8448594382. The cubic root of 1030400040 is about 1010.0323618033.

Adding to 1030400040 its reverse (400040301), we get a palindrome (1430440341).

The spelling of 1030400040 in words is "one billion, thirty million, four hundred thousand, forty".