70432390 has 16 divisors (see below), whose sum is σ = 144889632. Its totient is φ = 24148224.

The previous prime is 70432339. The next prime is 70432391. The reversal of 70432390 is 9323407.

It is a super-2 number, since 2×70432390² = 9921443122224200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70432391) 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, 503019 + ... + 503158.

It is an arithmetic number, because the mean of its divisors is an integer number (9055602).

Almost surely, 2^70432390 is an apocalyptic number.

70432390 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

70432390 is an abundant number, since it is smaller than the sum of its proper divisors (74457242).

70432390 is a wasteful number, since it uses less digits than its factorization.

70432390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006191.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 70432390 is about 8392.4007292312. The cubic root of 70432390 is about 412.9753613843.

Adding to 70432390 its reverse (9323407), we get a palindrome (79755797).

The spelling of 70432390 in words is "seventy million, four hundred thirty-two thousand, three hundred ninety".