69393840 has 40 divisors (see below), whose sum is σ = 215121648. Its totient is φ = 18504960.

The previous prime is 69393817. The next prime is 69393859. The reversal of 69393840 is 4839396.

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

It is a junction number, because it is equal to n+sod(n) for n = 69393792 and 69393801.

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, 144331 + ... + 144810.

Almost surely, 2^69393840 is an apocalyptic number.

69393840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

69393840 is an abundant number, since it is smaller than the sum of its proper divisors (145727808).

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

69393840 is a wasteful number, since it uses less digits than its factorization.

69393840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289157 (or 289151 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 69393840 is about 8330.2965133301. The cubic root of 69393840 is about 410.9354804269.

The spelling of 69393840 in words is "sixty-nine million, three hundred ninety-three thousand, eight hundred forty".