351640740 has 48 divisors (see below), whose sum is σ = 1074104640. Its totient is φ = 85246080.

The previous prime is 351640739. The next prime is 351640759. The reversal of 351640740 is 47046153.

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

It is a junction number, because it is equal to n+sod(n) for n = 351640698 and 351640707.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265735 + ... + 267054.

It is an arithmetic number, because the mean of its divisors is an integer number (22377180).

Almost surely, 2^351640740 is an apocalyptic number.

351640740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

351640740 is an abundant number, since it is smaller than the sum of its proper divisors (722463900).

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

351640740 is a wasteful number, since it uses less digits than its factorization.

351640740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532812 (or 532810 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 351640740 is about 18752.0862839312. The cubic root of 351640740 is about 705.8293745125.

Adding to 351640740 its reverse (47046153), we get a palindrome (398686893).

It can be divided in two parts, 351640 and 740, that added together give a triangular number (352380 = T₈₃₉).

The spelling of 351640740 in words is "three hundred fifty-one million, six hundred forty thousand, seven hundred forty".