740720642 has 16 divisors (see below), whose sum is σ = 1121541120. Its totient is φ = 366882768.

The previous prime is 740720641. The next prime is 740720647. The reversal of 740720642 is 246027047.

It is a junction number, because it is equal to n+sod(n) for n = 740720599 and 740720608.

It is not an unprimeable number, because it can be changed into a prime (740720641) 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, 200609 + ... + 204267.

It is an arithmetic number, because the mean of its divisors is an integer number (70096320).

Almost surely, 2^740720642 is an apocalyptic number.

740720642 is a deficient number, since it is larger than the sum of its proper divisors (380820478).

740720642 is a wasteful number, since it uses less digits than its factorization.

740720642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 740720642 is about 27216.1834576415. The cubic root of 740720642 is about 904.7976886679.

Adding to 740720642 its reverse (246027047), we get a palindrome (986747689).

The spelling of 740720642 in words is "seven hundred forty million, seven hundred twenty thousand, six hundred forty-two".