1390262500 has 72 divisors (see below), whose sum is σ = 3317787648. Its totient is φ = 505500000.

The previous prime is 1390262479. The next prime is 1390262501. The reversal of 1390262500 is 52620931.

It is not an unprimeable number, because it can be changed into a prime (1390262501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132445 + ... + 142555.

It is an arithmetic number, because the mean of its divisors is an integer number (46080384).

Almost surely, 2^1390262500 is an apocalyptic number.

1390262500 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 1390262500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658893824).

1390262500 is an abundant number, since it is smaller than the sum of its proper divisors (1927525148).

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

1390262500 is a wasteful number, since it uses less digits than its factorization.

1390262500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10151 (or 10129 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1390262500 is about 37286.2239976107. The cubic root of 1390262500 is about 1116.0892784955.

The spelling of 1390262500 in words is "one billion, three hundred ninety million, two hundred sixty-two thousand, five hundred".