1390543870 has 32 divisors (see below), whose sum is σ = 2524773888. Its totient is φ = 551393568.

The previous prime is 1390543853. The next prime is 1390543871. The reversal of 1390543870 is 783450931.

It is a super-2 number, since 2×1390543870² = 3867224508789153800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390543871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 778999 + ... + 780781.

It is an arithmetic number, because the mean of its divisors is an integer number (78899184).

Almost surely, 2^1390543870 is an apocalyptic number.

1390543870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1390543870 is a deficient number, since it is larger than the sum of its proper divisors (1134230018).

1390543870 is a wasteful number, since it uses less digits than its factorization.

1390543870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1390543870 is about 37289.9969160632. The cubic root of 1390543870 is about 1116.1645671208.

It can be divided in two parts, 13905 and 43870, that added together give a palindrome (57775).

The spelling of 1390543870 in words is "one billion, three hundred ninety million, five hundred forty-three thousand, eight hundred seventy".