1381247400 has 192 divisors, whose sum is σ = 4688449920. Its totient is φ = 334310400.

The previous prime is 1381247383. The next prime is 1381247423. The reversal of 1381247400 is 47421831.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 474349 + ... + 477251.

It is an arithmetic number, because the mean of its divisors is an integer number (24419010).

Almost surely, 2^1381247400 is an apocalyptic number.

1381247400 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 1381247400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2344224960).

1381247400 is an abundant number, since it is smaller than the sum of its proper divisors (3307202520).

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

1381247400 is a wasteful number, since it uses less digits than its factorization.

1381247400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996 (or 2987 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 1381247400 is about 37165.1368892945. The cubic root of 1381247400 is about 1113.6716335604.

The spelling of 1381247400 in words is "one billion, three hundred eighty-one million, two hundred forty-seven thousand, four hundred".