1378860240 has 40 divisors (see below), whose sum is σ = 4274467488. Its totient is φ = 367696000.

The previous prime is 1378860199. The next prime is 1378860247. The reversal of 1378860240 is 420688731.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1378860240² = 3802511122905715200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378860247) 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, 2872386 + ... + 2872865.

Almost surely, 2^1378860240 is an apocalyptic number.

1378860240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378860240 is an abundant number, since it is smaller than the sum of its proper divisors (2895607248).

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

1378860240 is a wasteful number, since it uses less digits than its factorization.

1378860240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5745267 (or 5745261 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1378860240 is about 37133.0074192759. The cubic root of 1378860240 is about 1113.0296907808.

The spelling of 1378860240 in words is "one billion, three hundred seventy-eight million, eight hundred sixty thousand, two hundred forty".