734640 has 40 divisors (see below), whose sum is σ = 2278128. Its totient is φ = 195840.

The previous prime is 734627. The next prime is 734647. The reversal of 734640 is 46437.

734640 = T₂₉₅ + T₂₉₆ + ... + T₃₁₀.

734640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 734640.

It is not an unprimeable number, because it can be changed into a prime (734647) 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, 1291 + ... + 1770.

2⁷³⁴⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

734640 is an abundant number, since it is smaller than the sum of its proper divisors (1543488).

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

734640 is a wasteful number, since it uses less digits than its factorization.

734640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077 (or 3071 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 734640 is about 857.1114279952. Note that the first 3 decimals coincide. The cubic root of 734640 is about 90.2315027712.

The spelling of 734640 in words is "seven hundred thirty-four thousand, six hundred forty".