1187429640 has 32 divisors (see below), whose sum is σ = 3562289280. Its totient is φ = 316647872.

The previous prime is 1187429603. The next prime is 1187429653. The reversal of 1187429640 is 469247811.

It is a junction number, because it is equal to n+sod(n) for n = 1187429592 and 1187429601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4947504 + ... + 4947743.

It is an arithmetic number, because the mean of its divisors is an integer number (111321540).

Almost surely, 2^1187429640 is an apocalyptic number.

1187429640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1187429640 is an abundant number, since it is smaller than the sum of its proper divisors (2374859640).

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

1187429640 is a wasteful number, since it uses less digits than its factorization.

1187429640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9895261 (or 9895257 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1187429640 is about 34459.1009749239. The cubic root of 1187429640 is about 1058.9349810859.

It can be divided in two parts, 11874 and 29640, that added together give a palindrome (41514).

The spelling of 1187429640 in words is "one billion, one hundred eighty-seven million, four hundred twenty-nine thousand, six hundred forty".